Solar Payback Period in Houston, Texas: When Does It Pay Off?
Houston, Texas — CenterPoint service area
When Does Solar Pay Off in Houston?
A 7kW system in Houston costs approximately $21,000 at $3/watt. With annual savings of $1,200 (based on CenterPoint Energy's 11.5¢/13.5¢ rate tiers), the break-even point is approximately 17.5 years.
Without Solar: Projected CenterPoint Energy Bills
CenterPoint Energy rates have increased 20% (2014-2024). If that trend continues, the average Houston bill looks like this:
| Year | Est. Monthly Bill (no solar) | With Solar |
|---|---|---|
| 2026 (today) | $155/mo | ~$42/mo |
| 2031 (5 years) | $170/mo | ~$42/mo |
| 2036 (10 years) | $186/mo | ~$42/mo |
| 2041 (15 years) | $204/mo | ~$42/mo |
Projections use the 20% (2014-2024) 10-year CAGR as a straight-line estimate. Actual rate changes vary. Solar bill estimates assume fixed system output.
The Compounding Advantage
The payback period calculation above uses today's rates. In reality, as CenterPoint Energy rates rise each year, your solar savings grow too — because every kWh your panels produce is worth more. This means the effective payback period is typically shorter than the static calculation suggests, and the 25-year savings figure grows significantly with each rate increase.
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Estimates on this page are based on local averages. A licensed installer will give you exact numbers for your home.
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